Connecting rod



top qor" the piston and thereby lessen L'thejar refereed Dec. 7, 19,26.4

f. 21,610,137;A i

couunc'rine non. Y

`llipxlplieetion filed 'January 28,',1-926. Sera1fNo.-8V4,332. l

My invention is a-Aconnecting rod' prefier-V ably for an internal'combustion engine-and ingthemech'anical method 4of 'driving'.a crank DY* M t is indicated `by the num-eral land a-portion'l of a crank shaftby.the numeral 1.2.2 'The from a piston.

A11 Object 0f extensible connecting rodso' designedthat itk may giveyslightly on the impulse ofthey i on the 'connecting rod ontheexplosion.-v

Another -object'of my' invention vis to em? ploy a' hydraulic-systemunder a more or vless constantlpressure for tak-ing tup thelthrust due' to the explosionfthis hydraulic arrangef 1 ,I ent Ybeingrod.'

incorporat'ed inthe connecting A particular object of my invention .isin theiormation of a connecting rod having afhydraulicchamberwith an airbell therein, the' bell being :thrust intorthe' hydraulic liq#uido'nlthe explosive stroke ofthe engine and thereby: compressing theVair and hence lre-` ducing the direct shock Aon the crank'.

' As :to myl mechanical .method,this com prises rotating a crank from areciprocating piston. fby transmittingwajorce giving 'torque Vto `thecrank shaft, lthe transmitted force :being yielding on a yfirst .impulsesuch as vthe .explosionand communicating an eX- tended force'before/.the piston starts onits return stroke. L 1 f In theconstruction of .my connecting rod I connect a'vcentral rod section tothe wrist pin of'va piston, thlisfrod'havingfa bell. ,inV

the opposite 'end.v lA .sleeve :is y' slidably mounted .on the rod and'attached to the journal cap of thecrank shaft, `the capand the lower'vend-10i? Qt'he sleeve-k being ormed .with ahydraulic chamber thereinadapted to .containoil 'lhe oilzislffed to Said chamber through: thelubricating lsystemjo'fA the engine being conducted underY pressure,throughr the crank andbymeans of groove'sin the con-v necting rod captokthe 'hydraulicy chamber.

My inventionv will be more-readily, underdrawings, inlwhih;

stoodl from.the `following description and i 'fFigure' 1 isVanielevationofinyconnectf rod.

:of Fig. A2,\in ,the direction o .'theerrows;

:FigL 4c isi a-.series `of ,diagrams'indicating rv.the Vaetioll oftheextensible'connecting .rod

my invention is to forni an'f A certain amount of oiflfis s In thedrawings, a-portioncfa cylinder piston Si'reciprocatesV in vthe cylinderhaving attached lthereto with my improved Jconnectingrod.designatedgenerally bythe numeral y @transmitting the reciprocating`motion of.'

the .piston vto .a rotar-y .motion-of a crank;

il preferably form the connecting Irod iny several sections, the.details being shown particularly'iin Figs. 11, 2 and '3. A wrist-pinstubr7 fconneots l,to the wrist'pin and hasta bell or.ou`p 1].at'itsilowerend'. Thek rod -isrA 'Y orinedjcylindricaland #the -skirtl2of .the

bell is iformedcylindrical. The rod has'annular grooves 18V in which arefit-ted expansion rings-14 similar to piston rings :and

having asimilar Jfunction ,otpreventing the ylongitudinal How .of yoil.as hereunder enplamed.

Asleeve l15 slidably mounted on ,the

rod, the sleeve having an enlarged section v `16 .engaging the skirtl12,.-so proportioned vfor 'the skirt V12 5to slide therein. Abutmentblocks 17 aresecuredat the ,enlargement 18 .of thesleeve,.functioningvas hereunder ex? plained.l The bearing 5 :has vaYcap section l19 and a lower section 20, these being cone' nected.togetheriinfbhe -usual manner. The

Cep sprovdd `with a cup 211 havin-gieJ screw threaded `"end engaging they enlarged section i 1*61? ol'thesleeve asindi'cated by the numeralTheewnkis pieve-ieri with in@ usual oir ingib'ore 23: havingga radialduct 1,24 leading touits periphery land I'the bearing' ,niay havel The.abovel constru'ction'iforms an oil cham- `ber'BO; this being.parti-ally inthe cup-21 and inthe ienlargenientjl ofthe Y sleeve 'an.air .chamber `3li-sforined fin the 'bell l1.

ej bushing .provided 'with' an-.vannular groove A shortL ',-oil-port12,6 leads upwardly lia-ving);` abazll i*28' withfa' cage129 forms the YY .,f. outlet of theiport'261into thelcup. f Fig. 2 1s asection `on theline 2-2 of Fig.

ueezed past .the i above the bell but lthe skirt vand the enlargement 1Gdo .not haven v tight ht this oil Y will work backwards and ',toruards.Acer-l tain amount of oil will be forced up the rod 9 but most of thiswill be retard-edrby thel Yexpansion rings .southat there will not be adischarge of; oil between the sleeve 15 and the rod 9. V-

vIn the/operation of the engine, this being preferably by an internalcombustion engine, it willreadily' be seen that on thefexplosion stroke,when Ythe piston is driven downwardly Vthe rod 9 will be thrust down-Vwa-rdly relative tothe sleeve and hence the bellVv llinay b -ecomeimmersed in the oil, Vthereby pressing theair in the bell. This reducesthe direct `shock-ot the explosion as transmitted from the `piston i tothe Vcrank fand near theV end of the explosion stroke, the e. air beingyunder very high pressure expands and gives ay further impulse to therotation Vot the crank.

The operation as it takes place in a tour cycle internal combustionengine is substantially as follows, being represented in Fig. Vl: Thediagram A represents the compression i stroke in whichtlie piston isbeing forced up by the Vcrank as indicated by the arrow andcompressingagas in the cylinder.v This compressed gas forced the rod 9downwardly, thrusting the belly into the oil to a certain extent.

The diagram B represents the explosion Vstroke in which there is astrong and sudden pressure on the piston', thus thrusting the bell downto a further extent in the oil and compressing the air to a greaterextent.

`rlhe diagram C represents the exhaust stroke withv the piston beingthrust upwardly by the crank and as there is very little back pressure:on the piston the abutment blocks l7fwill be in engagement or insubstantial engagement with the outside of the bell.

Diagram D represents Vvthe suctionstroke with which the piston ispulledY downwardly by thercrank, the ,bell being'brought into close.engagement with the abutment blocks 17 so that the sleeve draws the rod9. f

.From the above description it is believed ltliatrthe operation of mycushioning type of connecting .rod'will be apparent. IItlis obvious thatsuch connecting rod maybe utilized in other types of engines such vassteamy or other gas engines. Moreover, lthe same type ot' connecting rodmay bc utilized in a reverse manner in which a rotating crank is used topumpV a liquid or gaseous fluid.

My invention from the aspect of ay method comprises transmitting'aforcefrom ay reciprocating piston by reciprocating motion g' ,thisY beingchanged intou a rotarymotion by the crank and the jar ofthe impulse ofthe explosion` stroke being,` minimized by `compressing a gas or othercompressible medium,

Vto the crank. Y Y s Y 7. A connecting rod comprising in :coin.

a further portion ot the-explosion stroke allowing th'e compressedgaseous or other fluid to give the crank a rotary impulse.

e tY will be apparent from the above cle-- scription that the oilingsystem of the-engine when ota compression or torcedteed type'willcontinuously force oil throughr the crankaii'd into `the groove in thebearing 5 and henceinto thefroil chamber 30, the check valveQpi'eventingback How of the'oil due to its compression byffthe bell onvtheend ofl therodff).V i yit will be apparent `thatthe general designand specific Vdetails of my connecting;

rod may be considerably changed to adapt it to different typesof enginesand also thatL changes may be made inY incorporating it inY the ordinarytype of internal combustion en-v gine. Substantiallv the same type wouldbeV f suitable for a ktwo .stroke Aengine or for engines havingdilqerent stroke cycles.

' Such changes would be within the spirit or" my invention as set forthin the description, drawings and claims. Y

Having described my invention, what I claim is: f 'Y hln combination apiston, a'crank, a

connecting rod between same, the connecting rod having apluralityofslidable elements,

one ofsaid elements having an oil chamber and the 'other-having a'bellwhereby the bell is immersed inthe foil chamber in one direction ofmovement of the piston relative to the crank.`

2. ln combination a piston, a connecting `rod having a bell at'one endconnected thereto, a crank having a bearing,` a sleeve connected to thebearing, the sleevek being slidable on the rod and having an oil chamber`adjacent the crank.

3. in combination-a piston as claimed in'k claim 2, having in additionan oil duct leading through the bearing into the oil chamber;Y

4. In combination a piston 'having a wrist pin, a wrist pin stubconnected thereto, arodY 6. Incombination a piston as claimediii y claim4, having in addition a check valve in.y

the oil chamber to prevent4 back ilow o-voil bination 'a rod having oilretainingmeans thereon, acup formed atV one endof-therod, means adaptedto connect the other endof ythe rod to awrist pin, a sleeveslidable on Yf thenrod having an enIarged'endQ-the enlafrged' endhavng a sliding ftWith thebell, a Cap adapted to forma part of a bearing adapted to beattached to' avrerank and means connecting vthe sleeve andthe oep,"Y thecap andy the enlargementof the sleeve forming an K oil ehamnher.Y

8.AA connectngvfrod as claimed nkelam 7, having nraddtionran oil duetthrough they cap and a check Valvevnfthe oil chamber. l

In testimony whereof 'I1 havel signed my name to this speccation; Y

